Transient accumulation of cis- and trans-zeatin type cytokinins and its relation to cytokinin oxidase activity during cell cycle of synchronized tobacco BY‐2 cells. - Dobrev,P..; Motyka,V..; Gaudinova,A..; Malbeck,J..; Travnickova,A..; Kaminek,M..; Vankova,R.. (Plant Physiology and Biochemistry, 2003)